Apparatus and method for microwave heating using chaotic signals

ABSTRACT

A rotary nozzle device has:  
     a nozzle composed of plural rotatable hollow links which are mutually passable through,  
     a pump for press-feeding a fluid into the hollow links, and  
     at least one fluid injection port in at least one hollow link of the nozzle,  
     wherein the fluid is injected from the injection port while the hollow link is rotated by the force of the fluid pressurized by the pump, and  
     the motion of the injection port is set in chaotic state by adjusting a characteristic of the nozzle.

BACKGROUND OF THE INVENTION

[0001] 1. Industrial Field of Utilization

[0002] The present invention relates to an apparatus in which a chaostechnology is applied.

[0003] 2. Related Art of the Invention

[0004] The prior art is described below while referring to an example ofdish washer.

[0005] A conventional dish washer is shown in FIG. 14. Reference numeral101 denotes a body of a dish washer, 102 is a lid through which dishesare put inside the dish washer, 103 is a feed water hose for feedingwater into the dish washer, 104 is a nozzle drive pump for pressurizingwater from the feed water hose 103, 105 is a rotary nozzle, 106 is adrain pump for discharging water collected inside, 107 is a drain hosefor leading wastewater to outside of the dish washer, and 108 is acontrol circuit for controlling the operation timing of the nozzle drivepump 104 and drain pump 101. In thus constituted conventional dishwasher, the water supplied from the feed water hose 103 is pressurizedby the nozzle drive pump 104 and is supplied into the rotary nozzle 105.

[0006] A conventional example of the rotary nozzle 104 is shown in FIG.15. FIG. 15 is a top view of the rotary nozzle 105, which comprises fourwater injection ports (A, B, C, D). The water injection direction ateach injection port is set in the horizontal direction to the plane ofrotation of the nozzle in A, and in the vertical direction to the planeof the nozzle in B, C, D. Therefore, by the reaction of water injectionfrom the injection port A, the nozzle is put into rotation, while thedishes are washed by the injection of water from the other injectionports (B, C, D). Thus, the nozzle injects water to the dishes whilerotating.

[0007] The water injected to the dishes is collected in the drain pump106, pressurized, and discharged outside through the drain hose 107. Thenozzle drive pump 104 and drain pump 108 are controlled by the controlcircuit 108, so as to be controlled at adequate operation timingdepending on the cleaning process such as dish washing, rough rinsingand final rinsing.

[0008] The rotation trajectories of the injection ports of theconventional rotary nozzle 105 are shown in FIG. 16. As clear from FIG.16, the nozzle makes simple rotations, and the trajectory of injectionport is a complete circle. Therefore, the water injected from the rotarynozzle 105 hits only a limited area of a dish, and sufficient washingeffect is not obtained depending on the configuration of dishes, orwater does not permeate into narrow gaps of dishes.

SUMMARY OF THE INVENTION

[0009] In the light of such background, it is hence a primary object ofthe invention to present a rotary nozzle apparatus capable of drivingthe nozzle by applying the chaos technology so as to inject wateruniformly to the object.

[0010] To achieve the object, the invention presents a rotary nozzleapparatus comprising a pump for pressurizing a fluid, a nozzle composedof plural rotatable hollow links which are mutually in passing through,and at least one fluid injection port in at least one hollow link of thenozzle, in which the fluid is injected from the injection port whilerotating the hollow link by the force of the fluid pressurized by thepump, and the shape, weight, and position of center of gravity of thelink, the fluid injection angle of the injection port, and thepressurizing pattern of the pump are adjusted, so that the motion of thenozzle is set in chaotic state.

[0011] Chaos is characterized by unstable trajectory (see T. S. Parker,L. O. Chua: Practical Numerical Algorithm for Chaotic System,Springer-Verlag, 1989), the nozzle in chaotic state never passes thesame trajectory. Therefore, the nozzle in chaotic state is capable ofsprinkling water more uniformly as compared with the conventionalnozzle.

BRIEF DESCRIPTION OF THE DRAWINGS

[0012]FIG. 1 is a diagram showing a constitution of a rotary nozzleapparatus in a first embodiment of the invention.

[0013]FIG. 2 is an explanatory diagram of operation trajectory oftwo-link rotary nozzle.

[0014]FIG. 3 is an explanatory diagram of a method for detecting motionCL the nozzle.

[0015]FIG. 4 is an operation trajectory diagram of the rotary nozzle inchaotic state.

[0016]FIG. 5 is a diagram showing a constitution of a rotary nozzlehaving same effects as in the first embodiment.

[0017]FIG. 6 is a diagram showing a constitution of a rotary nozzleapparatus in a second embodiment.

[0018]FIG. 7 is a diagram showing changing patterns of pressurizingforce.

[0019]FIG. 8 is a diagram showing a constitution of a rotary nozzleapparatus in a third embodiment.

[0020]FIG. 9 is a diagram showing the constitution of connection of thefirst embodiment.

[0021]FIG. 10 is a diagram showing the constitution of connection of thethird embodiment.

[0022]FIG. 11 is an explanatory diagram of change of intensity ofinjected water depending on the rotation of link.

[0023]FIG. 12 is a diagram showing a constitution of a rotary nozzleapparatus in a fourth embodiment.

[0024]FIG. 13 is a diagram showing a constitution of a dish washer as afifth embodiment.

[0025]FIG. 14 is a diagram showing a constitution of a conventional dishwasher.

[0026]FIG. 15 is a diagram showing a constitution of a conventionalrotary nozzle.

[0027]FIG. 16 is a diagram showing a constitution of connection of thefifth embodiment.

[0028]FIG. 17 is a diagram showing a constitution of a prior art ofair-conditioner.

[0029]FIG. 18 is a diagram showing a constitution of an air-conditionerin a sixth embodiment.

[0030]FIG. 19 is an explanatory diagram of pie kneading conversion.

[0031]FIG. 20 is an explanatory diagram of Bernoulli shift.

[0032]FIG. 21 shows time series data generated by Bernoulli shift.

[0033]FIG. 22 is a diagram showing an electric circuit for generating achaos signal.

[0034]FIG. 23 is a diagram showing a chaotic on/off signal.

[0035]FIG. 24 is a diagram showing a constitution of an air-conditionerfor operating a wind direction plate chaotically.

[0036]FIG. 25 is a diagram showing a constitution of an air-conditionerfor driving a compressor chaotically.

[0037]FIG. 26 is a diagram showing a constitution of an air-conditioneras a seventh embodiment.

[0038]FIG. 27 is a diagram showing a constitution of an air-conditioneras an eighth embodiment.

[0039]FIG. 28 is a diagram showing a constitution of a refrigerator as aninth embodiment.

[0040]FIG. 29 is a diagram showing a constitution of a refrigerator as atenth embodiment.

[0041]FIG. 30 is a diagram showing a constitution of an electric fan asan eleventh embodiment.

[0042]FIG. 31 is a diagram showing a constitution of an electric heatedtable as a twelfth embodiment.

[0043]FIG. 32 is a diagram showing a constitution of an electroniccarpet.

[0044]FIG. 33 is a diagram showing a constitution of a microwave oven asa thirteenth embodiment.

[0045]FIG. 34 is a diagram showing a constitution of a microwave ovenfor driving the table chaotically.

[0046]FIG. 35 is a diagram showing a constitution of a microwave ovenfor driving the magnetron chaotically.

[0047]FIG. 36 is a diagram showing a constitution of an oven-toaster forchanging the output of the heater chaotically.

[0048]FIG. 37 is a diagram showing a constitution of a rice cooker as afourteenth embodiment.

[0049]FIG. 38 is a diagram showing a constitution of a hot plate as afifteenth embodiment.

[0050]FIG. 39 is a diagram showing a constitution of an electromagneticcooking apparatus as a sixteenth embodiment.

EMBODIMENTS

[0051]FIG. 1(a) is a structural diagram of a rotary nozzle apparatus ina first embodiment of the invention. Reference numeral 1 denotes anozzle drive pump for pressurizing feed water, and 2 is a two-linkrotary nozzle which is rotated by the force of water pressurized by thenozzle drive pump 1 so as to inject water.

[0052] A detailed structure of the two-link rotary nozzle 2 is shown inFIG. 1(b). The upper half of FIG. 1(b) is a top view of the two-linkrotary nozzle 2, and the lower half is a side view. As shown in FIG.1(b), the two-link rotary nozzle 2 is composed of two links (first link2-1, second link 2-2). Each link has plural injection ports, which areexpressed by symbols A to F in FIG. 1(b). The direction of blowing waterfrom each injection port differs in each injection port.

[0053] The links and link connection parts are hollow, and the watercoming supplied up to the water intake port beneath the first linkpasses through the inside of the hollow link, and can reach up to theinjection port of the first link or second link. Incidentally, the twolinks in the diagram are coupled at the center 02, and the second link2-2 is free to rotate at the center 02. The water intake port of thefirst link is connected to the object machine, but the first link 2-1 isfree to rotate at the center 01.

[0054] In thus composed rotary nozzle apparatus, the operation isdescribed below.

[0055] First, water is pressurized by the nozzle drive pump 1, and issupplied into the water intake port of the two-link rotary nozzle 2. Thesupplied water passes through the inside of the first link and secondlink, and is injected from the injection ports A to F. The waterinjection direction from each injection port is the upward direction tothe plane of rotation of the nozzle in B, C, D, E, and in the lateraldirection in A and F.

[0056]FIG. 1(b) shows the water injection direction at each injectionport by arrow. The injection ports B, C, D, E blow out the water in thedirection vertical to the plane of rotation of the nozzle, and wash thedishes. On the other hand, the injection ports A and F blow out thewater in the direction parallel to the plane of rotation of the nozzle,so that the nozzle can be rotated by the reaction of the injected water.

[0057] In this way, by inclining the water blowing direction fromseveral injection ports in the rotatable directions of the nozzle, arotary force can be applied to the links, and the nozzle can injectwater while rotating.

[0058] In the conventional rotary nozzle apparatus shown in FIG. 15,since water is injected parallel to the plane of rotation of the link,water is injected while rotating. However, in the conventional rotarynozzle apparatus, since there is only one link, the trajectory of theinjection port is a simple circle.

[0059] In the embodiment, by contrast, the nozzle is composed of twolinks, and the rotary trajectory of the injection port on the secondlink is more complicated than the conventional circular trajectory.

[0060] A simulation result of rotary trajectory of the injection port Din the conventional rotary nozzle apparatus in FIG. 15 is shown in FIG.2(a), and a simulation result of the injection port C on the second link2-2 of the two-link rotary nozzle 2 is shown in FIG. 2(b). In FIG. 2(b),however, the structure of the first link 2-1 and second link 2-2 of thetwo-link rotary nozzle is designed to be symmetrical about the center ofrotation of each link (in this case, the center of rotation of each linkcoincides with the position of the center of gravity of each link), andthe water injection direction of the injection ports A and F is acompletely lateral direction, from which the simulation result isobtained, and accordingly, in this case, the ratio of the rotating speedof the first link 2-1 to the rotating speed of the second link 2-2 isconstant, being about 2:5 in this case.

[0061] As known from FIG. 2, the injection port of the conventionalrotary nozzle apparatus moves on one circumference, while the nozzle ismaking more complicated actions in the embodiment.

[0062] In the case of FIG. 2(b), the rotation is periodic, and whatevertime may pass, the injection port will not pass other than thetrajectory shown in FIG. 2(b). In the two-link rotary nozzle 2, however,by changing the design of the link and injection port, it is possible todrive more complicatedly than in FIG. 2(b).

[0063] As the more complicated state of trajectory, the chaotic state isknown. The chaos herein means a deterministic chaos, and refers to astate which appears to be very unstable and random although a completeequation of motion is described. That is the chaos state is not “atrandom” but it does not take same track for ever in theory, that is, itdoes not take periodical track. The motion of a device having plurallinks, such as the two-link rotary nozzle 2 can be transformed into achaotic state. For example, a manipulator with two or more links or adouble pendulum is known to be transformed into a chaotic state (seeNagashima & Baba: Introduction to Chaos, Baifukan 1992 Cin Japanese).

[0064] Chaos is basically characterized by unstable trajectory, and willnever pass the same trajectory again. Therefore, by setting the two-linkrotary nozzle into chaotic state, water can be injected more uniformly.

[0065] As the index of chaotic state, the chaos feature amounts such asthe fractal dimension and Lyapunov exponent are known. By varying thewater injection direction of the injection port, or the center ofgravity, shape or weight of the link in order that these values may beappropriate, the two-link rotary nozzle can be set in chaotic state.

[0066] Herein, as an example, a method of determining the water blowingdirection of the injection port, the shape and position of center ofgravity of the link by using the largest Lyapunov exponent is shown.

[0067] The Lyapunov exponent is a numerical value showing how sensitiveis the state trajectory to the initial value, and in particular when thelargest Lyapunov exponent is a positive value, it is known that thesystem behaves chaotically. Several methods have been already proposedat academic meetings for calculating the Lyapunov exponent. Herein, thelargest Lyapunov exponent is calculated by the method proposed by Satoet al. (S. Sato, M. Sano, Y, Sawada: “Practical methods of measuring thegeneralized dimension and the largest Lyapunov exponent in highdimensional chaotic system” Prog. Theor. Phs., Vol. 77, No. 1, January1987)

[0068] Suppose, as shown in FIG. 3, an angle sensor is attached to thetwo-link rotary nozzle 2 so as to detect the rotational angle of thefirst link and second link, individually. From the detected rotationalangle, the position of the front end of the second link can be easilycalculated, and the position is expressed as x(i), y(i), where i refersto the time. From the nozzle front end position x(i), consequently, atime series vector X(i)={x(i), x(i+T), x(i+2T), . . . , x(i+(d−1)xT)} iscreated, and an attractor is recomposed, where d denotes the dimensionof the time series vector, and T is the time lag amount. Both d and Tare set at proper values. At this time, selecting a proper hyper planein an d-dimensional space, and a vector X(i)−X(i+1) crossing this hyperplane is determined. The coordinates of the intersection on the hyperplane is determined as the point of interior division of X(i) andX(i+1), and a set on the plane {Xp1, Xp2, . . . , Xpk, . . . } iscreated. In this set, all pairs of which distance is not more than thespecified threshold value E are selected, and two points among them areexpressed as Xpk, Xpk′. At this time, the largest Lyapunov exponent Lis. calculated in the following formula. $\begin{matrix}{{L({tau})} = {\frac{1}{tau}\frac{1}{Np}{\sum\limits_{K = 1}^{Np}\frac{{{Xpk} + {tau} - {Xpk}^{\prime} + {tau}}}{{{Xpk} - {Xpk}^{\prime}}}}}} & (1)\end{matrix}$

[0069] where Np denotes the total number of data pairs of which distanceis not more than the threshold value E.

[0070] In formula (1), it is known that L(tau) converges when the valueof tau is increased. The value of L(tau) when converging is the largestLyapunov exponent. Other methods are also proposed for calculating thelargest Lyapunov exponent (for example, T. S. Parker, L. O. Chua:Practical Numerical Algorithm for Chaotic System, Springer-Verlag,1988). If calculated in other methods, the same effects as in theembodiment will be obtained.

[0071] By repeating such calculation as to determine the largestLyapunov exponent while varying the angle of injection port on thesecond nozzle, or the center of gravity of link, etc., it is possible tofind the moment when the largest Lyapunov exponent becomes a positivevalue not zero.

[0072] By conforming to the design of the injection port and link whenthe largest Lyapunov exponent becomes positive, the nozzle can drive thechaotic state.

[0073]FIG. 4 shows the trajectory of the injection port C of thetwo-link rotary nozzle in chaotic state. FIG. 4 is not obtained bynumerical calculation, but is obtained by the angle sensors in FIig.3when the actual machine of the two-link rotary nozzle 2 is set inchaotic state.

[0074] As clear from FIG. 4, the nozzle passing region is increased fromthe state in FIGS. 2(a), (b), and it is known that water can besprinkled uniformly.

[0075] Incidentally, it is only in the design stage of the nozzle alonethat the angle sensor is installed as shown in FIG. 3, and it is notneeded in the shipped product and in ordinary operation, and the rotarynozzle apparatus is constituted as shown in FIG. 1.

[0076] As described so far, according to the embodiment, using a nozzlecomposed of two links, by properly setting the water injection directionof the nozzle, or the position of center of gravity, weight or shape ofthe links, the motion of the nozzle can be set in chaotic state. Thenozzle in chaotic state is unstable in trajectory, and does not pass thesame trajectory again. Therefore, water can be sprinkled uniformly, andalso by investigating the chaos feature amount such as the Lyapunovexponent, the nozzle can be set in an appropriate chaotic state.

[0077] In this embodiment, meanwhile, as the parameter of the nozzle tobe changed, the water blowing angle of the injection port, the positionof center of gravity and weight of the link, and the like were used.Therefore, the nozzle motion can be always set in chaotic state anduniform washing is realized even when, as shown in FIG. 5, (a) theposition of center of gravity of the second link is varied, (b) theposition of center of gravity is changed by putting a weight on thesecond link, (c) multiple links are used instead of two, or (d) the playin the joint between the first link and second link is increased so thatthe center of rotation or center of gravity of the link may varydepending on the flow of water.

[0078] Also in the embodiment, although the largest Lyapunov exponent isused as the method for judging the chaotic state, the same effect isobtained by using other feature amount such as the fractal dimension. Inparticular, the fractal dimension is excellent as a method of judgingthe chaotic state. The fractal dimension indicates the self-similarityof obtained data, and a non-integer dimension is presented in chaos. Asthe fractal dimension, several dimensions are proposed, includinginformation dimension, capacity dimension and correlation dimension.Among these dimensions, the correlation dimension is widely employedbecause the calculation is easy.

[0079] The correlation dimension was first proposed by Grassberger andProcaccia in 1983, and it is determined by using the correlationintegral. The correlation integral C(r) is determined in the followingformula. $\begin{matrix}{{C(r)} = {\frac{1}{N*N}{\sum\limits_{i,j}^{N}{H\left( {r - {{{X(i)} - {X(j)}}}} \right)}}}} & (2)\end{matrix}$

[0080] where X(i) is the time series vector defined above, H denotesHeaviside function, and N is the total number of time series vectors.

[0081] when the correlation integration C(r) has the following relation,D is called the correlation dimension.

log C(r)=D log r+Q  (3)

[0082] where Q is a constant. To determine the correlation dimension,first, C(r) is calculated by Eq.(2), for some vlues of r, then the leastsquare method is applied to the calculated data of log C(r) and log r toobtain the proportional constant D. The obtained D converges as thevalue of the dimension number d of vector X is increased. Whenconverging sufficiently, D is the final calculation result of thecorrelation dimension. Therefore, while varying the design items of thetwo-link rotary nozzle 2, such as water injection angle of injectionport and position of center of gravity of the link, by repeating thecalculation to find the correlation dimension, it is possible to findthe moment when the correlation dimension takes a proper value(non-integer). By setting the two-link rotary nozzle in the situation atthis time, the chaotic state can be driven.

[0083] As mentioned above, for fractal dimension, various calculationmethods are proposed for various dimensions, aside from correlationdimensions, including capacity dimension and information dimensions, butif determined by employing other methods, the same effects as in theembodiment are obtained, that is, uniform water sprinkling capability isachieved.

[0084]FIG. 6 is a structural diagram of a rotary nozzle apparatus in asecond embodiment of the invention. Reference numeral 1 is a nozzledrive pump for pressurizing supplied water, and 2 is a two-link rotarynozzle which is rotated by the force of the water pressurized by thenozzle drive pump 1 so as to inject water, and they are same as in theconstitution of the first embodiment. What is different from the firstembodiment is that a pressurizing force control circuit 10 forcontrolling the pressurizing force of the nozzle drive pump 1 isprovided. In thus constituted rotary nozzle apparatus, the operation isdescribed below.

[0085] In the first embodiment, it is explained that the two-link rotarynozzle is set in chaotic state by properly designing the water injectionangle of the injection port, center of gravity of link, etc. The nozzlein chaotic state is unstable in trajectory, and always varies intrajectory, never passing the same trajectory again. Therefore, ascompared with the nozzle making periodic motions, it is possible tosprinkle water more uniformly.

[0086] It is known that a chaotic state is more likely to occur in asystem having a higher degree of freedom. In this embodiment, as asystem capable of realizing chaotic state more easily, an explanation isgiven to the rotary nozzle apparatus increased in the degree of freedomof system by varying the pressurizing force of the nozzle drive pump 1by means of the pressurizing force control circuit 3.

[0087] When the output of the nozzle drive pump 1 is varied by thepressurizing force control circuit 10 as shown in FIG. 7, the degree offreedom of the entire rotary nozzle apparatus increases, and the nozzleeasily changes to a chaotic state. In FIG. 7, the axis of abscissasdenotes the time, and the axis of ordinates represents the pressurizingforce of the nozzle drive pump 1, showing examples of three kinds ofpressurizing force changing pattern, (a), (b), (c). FIG. 7(a) showsrepetition of ON and OFF, (b) changes in trigonometric function, and (c)changes in sawtooth waves.

[0088] By using any one of these pressurization patterns, the two-linkrotary nozzle is easily set in chaotic state. In this way, by varyingthe pressurizing force of the nozzle drive pump 1 relatively to the timeby means of the pressurizing force control circuit 10, the nozzle can beset in chaotic state.

[0089] As explained herein, according to the embodiment, using thetwo-link rotary nozzle, by changing the pressurizing force of the nozzledrive pump 1 by means of the pressurizing force control circuit 10, thenozzle behavior can be set in chaotic state. The nozzle set in chaoticstate is unstable in behavior, and does not pass the same trajectoryagain. Therefore, uniform water sprinkling is realized.

[0090] Or, by combining with the method disclosed in the firstembodiment, while investigating the chaos feature amount such asLyapunov exponent, the pressurizing pattern of the nozzle drive pump 1may be varied, or the water injection direction of injection port, orthe position of center of gravity of link may be changed, so that thenozzle may be set in a proper chaotic state. In this case, since thefeature amount such as Lyapunov exponent is detected, the degree ofchaos may be properly set, and when applied in a dish washer, a furthereffect is brought about in the aspect of washing speed.

[0091] Examples of pressurizing pattern of the pressurizing forcecontrol circuit 10 are shown in FIG. 7, but other patterns than shown inFIG. 7 may be also used. In particular, a pressurizing pattern generatedby such a function as to produce a chaos signal directly may be used. Byway of illustration thereof, an example of pressurizing pattern bylogistic function known well as chaos signal is shown below.

[0092] Supposing the time to be t and the pressurizing force of thenozzle drive pump 1 to be p(t) (the variable range of pressurizingforce, ≦p(t) P, the following function is assumed to be a pressurizingpattern.

p(t+T)=4*p(t)*(1−p(t)/P)  (4)

[0093] Herein, a logistic function is directly expressed as apressurizing force, and when the pressurizing force of the nozzle drivepump 1 is controlled by using this formula (4), the nozzle behaviorcomes in chaotic state. Incidentally, the same effect as in theembodiment is obtained when the pressurizing force of the nozzle drivepump 1 is controlled by using other functions that produce chaos signalother than logistic function, such as tent function, Bernoulli shift,and intermittent chaos.

[0094]FIG. 8 is a structural diagram of a rotary nozzle apparatus in athird embodiment of the invention. Reference numeral 1 is a nozzle drivepump for pressurizing supplied water, which is same as in the firstembodiment. What differs from the first embodiment is that the two-linkrotary nozzle 2 is modified into a water stream suppressing typetwo-link rotary nozzle 20. In thus constituted rotary nozzle apparatus,the operation is described below.

[0095] A chaotic state is more likely to occur when the degree offreedom of the object system is higher. In the second embodiment, byvarying the output of the nozzle drive pump 1, the degree of freedom ofthe entire nozzle drive device is increased, and a chaotic state isproduced. In other method of increasing the degree of freedom of thesystem, for example, the structure of the joint of each link can bechanged.

[0096] In this embodiment, the link joint structure is modified, and therotary nozzle apparatus is set in chaotic state as described below.

[0097] The structure of the joint part of the link of the rotary nozzleapparatus disclosed in the first embodiment is as shown in FIG. 9.

[0098]FIG. 9(1) shows the structure of the joint of the first link 2-1and second link 2-2 of the two-link rotary nozzle 2. Usually, the secondlink 2-2 is put on the joint enclosed by a circle, and fixed with nut sothat the second link 2-2 may not be separated from the first link 2-1.However, the second link 2-2 is free to rotate.

[0099] FIGS. 9(a), (b) are magnified views of the circle enclosedportion (joint) of the first link 2-1 in FIG. 9(1), showing a side viewin FIG. 9(a) and a top view in (b). In the joint shown in FIG. 9, inorder that water may flow smoothly from the first link to the secondlink, four large holes are provided in the joint, and water can beguided from the first link to the second link with a small resistance.

[0100] By contrast, in the third embodiment, there is a water streamsuppressing type two-link rotary nozzle 20 having a joint structured asshown in FIG. 10. As clear from FIG. 10, this water stream suppressingtype two-link rotary nozzle 20 has a fewer number of holes in the jointas compared with the first embodiment, and the water flow in the jointarea is limited almost in one direction.

[0101] In the joint structure in FIG. 9, the total area of holes iswide, and the water resistance in the joint hardly changes regardless ofthe angle formed by the first link and second link. On the other hand,in the water stream suppressing type two-link rotary nozzle 20, sincethe water flow is limited almost in one direction in the joint area asshown in FIG. 10, the water injection force varies depending on therelative position of the links.

[0102] Change of injection force of water depending on the relativeposition of the links in the water stream suppressing type two-linkrotary nozzle is explained with reference to FIG. 11. In FIG. 11(a), thesecond link 20-2 is positioned almost in the same direction as the firstlink 20-1. At this time, the water flow up to the injection port F isindicated by dotted line in the diagram. Since the joint of the firstlink is as shown in FIG. 10, the resistance to water flow up to theinjection port F is small, and the water is injected from the injectionport F gushingly.

[0103] In FIG. 11(b), the angle formed by the second link 20-2 and firstlink 20-1 is about 90 degrees. In this case, the water flow up to theinjection port F is bent as indicated by dotted line. At this time,since the joint of the first link is structured as shown in FIG. 10, thewater flow is bent more than expected in a certain point. The bendingportion is narrow in the water path as compared with the case in (a),and the resistance to water flow increases. Therefore, the gush of waterinjected from the injection port F drops, while the gush of water fromthe injection port of the first link where water is easy to pass isincreased.

[0104] Thus, by using the water stream suppressing type two-link rotarynozzle 20 modified in the structure of the joint, the injection force ofthe water from each injection port varies depending on the relativeposition of the links. Therefore, as compared with the first embodiment,the degree of freedom to the behavior of the nozzle is increased, and itis more likely to transform into chaotic state.

[0105] As explained herein, according to the embodiment, using thenozzle with multiple links, by partly suppressing the water streamflowing in the nozzle or in the joint area, the gush of the water comingout of the injection port can be varied depending on the relativeposition of the links. It means that the degree of freedom of the entirenozzle drive device can be increased, so that the nozzle behavior may beeasily set in chaotic state. The nozzle in chaotic state is unstable intrajectory, and never passes the same trajectory again. Therefore, thewater can be sprinkled uniformly.

[0106] Combining with the method disclosed in the first embodiment, itis also possible to set the nozzle in an appropriate chaotic state byinvestigating the chaos feature amount such as Lyapunov exponent,varying the design of the joint, or changing the injection direction ofwater from the injection port, or the position of center of gravity ofthe link. In this case, since the feature amount such as Lyapunovexponent is detected, the degree of chaos can be properly set, whichbrings about a further effect in cleaning speed or the like.

[0107]FIG. 12 is a structural diagram of a rotary nozzle apparatus in afourth embodiment of the invention. Reference numeral 1 is a nozzledrive pump for pressurizing supplied water, 2 is a two-link rotarynozzle which is rotated by the force of water pressurized by the nozzledrive pump 1 to inject water, and 10 is a pressurizing force controlcircuit for controlling the pressurizing amount of the nozzle drivepump, and these are similar to the constitution of the third embodiment.

[0108] What differs from the third embodiment is the provision of asensor 30 for detecting the motion of the two-link rotary nozzle, andchaos feature amount calculating circuit for calculating the featureamount of chaos from the observation about the motion of the nozzledetected by the sensor 30. In thus constituted rotary nozzle apparatus,the operation is described below.

[0109] The first to third embodiments relate to the nozzle drive devicewhich operates in chaotic state. In a dish washer, for example, uniforminjection of water is demanded, and it is desired to operate the nozzlealways in chaotic state.

[0110] If, however, the nozzle is disturbed by dust etc., and thedynamic characteristic of the system varies, the chaotic state may notbe always maintained in the methods explained in the first to thirdembodiments. To avoid such case, in this embodiment, the nozzle motionis detected in real time, and an apparatus capable of driving always instable chaotic state is presented.

[0111] The sensor 30 detects the nozzle motion, and plural angle sensorsas shown in FIG. 3 may be used, or an image processing technology suchas video camera may be applied. In this case, the angle sensor in FIG. 3is used.

[0112] The angle of each link detected by the sensor 30 is entered intoa chaos feature amount calculating circuit 31, and the largest Lyapunovexponent which is one of the chaos feature amounts explained in thefirst embodiment is calculated. The calculating method of the largestLyapunov exponent in the chaos feature amount calculating circuit 31 maybe either the method mentioned in the first embodiment or other methodproposed at academic society.

[0113] When the largest Lyapunov exponent is a positive value, it meansthe nozzle is in chaotic state, and when it is 0, it is in periodic orquasi-periodic state.

[0114] Therefore, the chaos feature amount calculating circuit 31 sendsa command, depending on the calculated largest Lyapunov exponent, to thepressurizing force control circuit 10 for varying the pressurizingpattern if the largest Lyapunov exponent is near 0 or negative, or sendsa signal to the pressurizing force control circuit 10 to continuepresent pressurizing pattern if the largest Lyapunov exponent is apositive value not close to 0.

[0115] The pressurizing force control circuit 10 varies the pressurizingpattern according to the signal of the chaos feature amount calculatingcircuit 31. The method of change is to vary the ON time Ton or OFF timeToff in FIG. 7(a) when pressurized in the pattern as shown in FIG. 7(a),or to vary the period of the sine curve when pressurized in the patternas shown in FIG. 8(b).

[0116] As explained herein, according to the embodiment, by observingthe nozzle motion by the sensor and calculating the chaos feature amountfrom the result of observation, the nozzle driving state can be known.Furthermore, by using this information in control of pressurizing force,the nozzle can be driven always in optimum chaotic state. The nozzle inchaotic state is unstable in behavior, and does not pass the sametrajectory again. Therefore, by keeping always in chaotic state, uniformsprinkling of water is realized.

[0117] In the invention, since the sensor 30 is added, non-chaoticstate, that is, periodic or quasi-periodic state can be also detected.Therefore, not only to keep in chaotic state, it is also possible tochange over chaotic state and periodic state depending on the purpose ofuse of the nozzle or the situation of use. In this embodiment, the chaosfeature amount calculating circuit 31 calculates the largest Lyapunovexponent, but the same effects are obtained by using other chaos featureamounts such as correlation dimension, capacity dimension, informationdimension, other fractal dimension, and Lyapunov dimension.

[0118] As a fifth embodiment of the invention, a dish washer isexplained. FIG. 13 shows the structure of a dish washer in thisembodiment, in which reference numeral 101 is a body of a dish washer,102 is a lid, 103 is a water feed hose for taking water into the dishwasher, 104 is a nozzle drive pump for pressurizing the water from thefeed water hose 103 to rotate the nozzle and inject water, 106 is adrain pump for discharging the water applied on dishes, 107 is a drainhose for leading the wastewater to the outside of the dish washer, and108 is a control circuit for controlling the nozzle drive pump 104 anddrain pump 106. So far, these are common to the parts in the prior artin FIG. 14. What differs from the prior art is that the two-link rotarynozzle 2 explained in the first embodiment is used instead of theone-link rotary nozzle.

[0119] As explained in the first embodiment, the two-link rotary nozzlecan be set in chaotic state. By using the two-link rotary nozzle 2 inchaotic state, the nozzle moves in the trajectory shown in FIG. 4, andthe water is injected to the dishes in more varied directions than themotion trajectories of the prior art in FIG. 2, so that the water can besprinkled uniformly.

[0120] Therefore, in the dish washer using two-link rotary nozzle, ascompared with the prior art, water can be injected into every nook andcranny of the dishes, and the stains of dishes can be removedsufficiently. Besides, in the prior art, the nozzle trajectory was aspecific circumference, and to remove the stains, the manner of placingdishes must be sufficiently considered, but in this embodiment, sincethe nozzle trajectory is always changing, a sufficient washing effect isobtained without particularly considering the dish placing manner.

[0121] As described herein, by using the rotary nozzle composed ofplural links in chaotic state, water can be injected to the dishes moreuniformly than in the prior art, and the washing efficiency of the dishwasher can be enhanced. In the embodiment, meanwhile, the two-linkrotary nozzle explained in the first embodiment is applied in the dishwasher, but the rotary nozzle apparatus described in the second tofourth embodiments may be also used. The rotary nozzle apparatus isapplied in the dish washer in this embodiment, but it may be alsoapplied in other washers for washing automobiles, semiconductor devices,and other objects, not limited to the dishes, and a similar enhancementof washing efficiency is expected. It can be also applied in thesprinkler, spraying machine, and other sprinkling machine for sprinklingliquid uniformly.

[0122] As a chaos applied equipment, an example of applying the chaostechnology into an air-conditioning equipment is described below. Astructure of a conventional air-conditioner is shown in FIG. 17. FIG. 17shows the cooling operation of the air-conditioner. In FIG. 17,reference numeral 101 denotes a compressor for compressing a refrigerantsuch as CFC, 102 is a four-way valve for changing over the refrigerantflowing direction depending on whether the operation is cooling orheating, 103 is an outdoor heat exchanger for exchanging the heat of therefrigerant with the heat of the ambient air (to release the heat of therefrigerant when cooling, and absorb the external heat when heating),104 is an outdoor fan for exchanging heat efficiently in the outdoorheat exchanger 103, 105 is an outdoor fan rotating speed changeoverdevice for changing over the rotating speed of the outdoor fan dependingon the operating state of the air-conditioner, 106 is a capillary tubecomposed of a fine copper pipe for applying a resistance and loweringthe refrigerant pressure by passing the refrigerant of high pressurecoming from the outdoor heat exchanger 103 through a narrow passage, 107is an indoor heat exchanger for exchanging the heat of the refrigerantwith the heat of the room air, 108 is an indoor fan for blowing cold air(in the case of cooling) into the room, 109 is a wind direction platefor adjusting the direction of the wind produced by the indoor fan 108,110 is a sensor for detecting the room temperature or humidity, 111 anindoor fan rotating speed changeover device for changing over therotating speed of the indoor fan 108 depending on the output signal ofthe sensor 110, and 112 is a compressor control device for controllingthe compressor 101 depending on the output of the sensor 110. In thediagram, the thick line indicates the pipe which is insulated in orderto circulate the refrigerant in.

[0123] In thus constituted air-conditioner, the cooling operation iseffected in the following procedure.

[0124] 1. The refrigerant is compressed by the compressor 101, and therefrigerant is set in the state of high temperature and high pressure.

[0125] 2. The refrigerant at high temperature and high pressure passesthrough the four-way valve 102, and is led into the outdoor heatexchanger 103. In the outdoor heat exchanger 103, the refrigerant iscooled nearly to the ambient temperature, and the refrigerant isliquefied.

[0126] 3. Consequently, the cooled liquid refrigerant at high pressurepasses through the capillary tube 106, and the pressure of therefrigerant is lowered.

[0127] 4. The refrigerant lowed in pressure is evaporated in the indoorheat exchanger 107. The refrigerant deprives of heat of vaporizationwhen evaporated, and hence the air in the indoor heat exchanger 107 andits vicinity is cooled below the dew point.

[0128] 5. The cooled air is blown out from the indoor fan 108,circulates in the room, and lowers the entire temperature of the room.

[0129] 6. The refrigerant vaporized in the indoor heat exchanger 107passes through the four-way valve 102, and is led into the compressor101, thereby returning to step 1.

[0130] In this procedure, the cooling operation is realized. The heatingoperation is realized by varying the refrigerant flowing direction bythe four-way valve 102.

[0131] The compressor 101 and indoor fan 108 are controlled depending onthe room temperature and other conditions detected by the sensor 110.More specifically, the compressor control device 112 and indoor fanrotating speed changeover device 111 take in the output signal of thesensor 110, and respectively control the output of the compressor 101and rotating speed of the indoor fan 108. As the indoor fan 108, acylindrical fan is widely employed, and it is controlled stepwise so asto produce a strong wind when a room temperature over a specified valueis detected by the sensor 110, and a weak wind when less than thespecified value.

[0132] However, only by stepwise change of the output of the indoor fan108, when the room temperature is set in a certain range, thecirculation route of the air stream in the room becomes constant, and acertain specific convection is formed. Therefore, in the room, cold wind(in the case of cooling) is applied to some spots, but not applied toother spots, and uneven temperature distribution of cooled points anduncooled points occurs. This embodiment is intended to solve suchproblem.

[0133]FIG. 18 shows a sixth embodiment of the invention, specificallyshowing the constitution of the air-conditioner.

[0134]FIG. 18 shows the cooling operation of the air-conditioner, inwhich reference numeral 101 denotes a compressor, 102 is a four-wayvalve, 103 is an outdoor heat exchanger, 104 is an on outdoor fan, 103is an outdoor fan rotating speed changeover device, 106 is a capillarytube, 107 is an indoor heat exchanger, 108 is an indoor fan, 109 is awind direction plate, 110 is a sensor for detecting the temperature andhumidity in the room, and 112 is a compressor control device, and theseare same as in the constitution of the prior art.

[0135] What differs from the prior art is the provision of the chaossignal generating circuit 1 for generating a chaos signal, and theindoor fan drive device 2 for controlling the driving state of theindoor fan 108 depending on the output signal of the chaos signalgenerating circuit 1 and the output signal of the sensor 110.

[0136] The chaos signal is a complicated signal dominated by arelatively simple rule. It, however, possesses a feature that isdifferent from a mere random signal. (See Nagashima, Baba: Introductionto Chaos—Analysis and Mathematic Principle of Phenomenon, Baifukan.)

[0137] As the principle of a system for generating a chaos signal,so-called pie-kneading conversion (baker's transformation )is known. Thepie-kneading conversion is a conversion by repeating stretching andfolding as shown in FIG. 19. In FIG. 19, a pie dough is stretchd, andfolded down in two. By repeating this conversion of atretching andfoloding several times, the ingredients of pie dough are mixed well, anda uniform texture of pie dough is obtained.

[0138] The pie kneading conversion is excellent in the capability ofmaking the object uniform, in particular. For example, for a pie doughof 1 cm in thickness, when pie kneading conversion is applied ten times,a pie dough in a thickness of about 10 microns is plaited in 1024layers, and when the conversion is repeated 20 times, the layer of thedough is thinned to a thickness of molecular level, and the number oflayers exceeds 1,000,000. Thus it is known that the pie kneadingconversion is capable of making the object sufficiently uniform.

[0139] As a typical example of function for generating a chaos signal, aconversion known as Bernoulli shift expressed below is known.$\begin{matrix}{{x\left( {n + 1} \right)} = \left\{ \begin{matrix}2 & {x(n)} & {0 < {x(n)} \leqq 0.5} \\2 & {{x(n)} - 1} & {0.5 < {x(n)} \leqq 1}\end{matrix} \right.} & (5)\end{matrix}$

[0140] From formula (5), the relation of x(n) and x(n+1) of Bernoullishift may be expressed as shown in FIG. 20. The time series datagenerated from the Bernoulli shift calculated from formula (5) may beillustrated as shown in FIG. 21. Although the time series data iscalculated by a very simple numerical expression as shown in formula(5), it appears to present an irregular behavior.

[0141] It is known there is a relation between Bernoulli shift and piekneading conversion. The data x(n) belonging to the region of 0<x(n) 0.5on the axis of abscissas in FIG. 20 is magnified (two times) by theBernoulli shift, and is mapped into x(n+1) in 0<x(n+1) 1.0. It is thesame in the portion of 0.5<x(n) 1.0. This conversion corresponds to thestretching of the pie kneading conversion. Besides, as clear from thediagram, the data of 0<x(n) 0.5 and 0<x(n) 1.0 are once magnified, andrespectively mapped copied into the same region of 0<x(n) 1.0. Thisoperation means folding of pie kneading operation.

[0142] Therefore, it is known that Bernoulli shift is the conversion ofstretching and folding of pie kneading conversion.

[0143] Hence, the chaos signal that is deduced by repeating theconversion such as Bernoulli shift a number of times possesses the piekneading conversion as its basic characteristic, and the capability ofmaking the object uniform is known. Incidentally, the function havingthe pie kneading conversion as the principle is not limited to theBernoulli shift, but includes various functions including the logisticfunction and tent mapping.

[0144] This feature of making uniform is related with the basiccharacteristics of chaos, such as dependence on initial value,instability of trajectory, and consistency. (See T. S. Parker, L. O.Chua: Practical Numerical Algorithm for Chaotic System,Springger-Verlag, 1989.) These properties are mutually related, but inparticular the instability of trajectory is important. It means that thesystem incessantly changes the, state unstably, never repeating the samestate change again, and the output behaves to fill up the output spaceor the state space densely.

[0145] By rotating the indoor fan 108 of the air-conditioner accordingto such chaos signal, the indoor fan is set in various operating state,never repeating the same state series. Hence, the indoor air can beagitated sufficiently.

[0146] In the conventional air-conditioner, the output of the indoor fan108 only changes stepwise in proportion to the temperature detected bythe sensor 110. Therefore, when the room temperature comes in a certainrange, the circulation route of air stream in the room becomes constant,and cold air (in the case of cooling) is applied to some points and notapplied in other points in the room, and uneven temperature of cooledplace and uncooled place occurs. In the embodiment, having suchconstitution, the circulation route of the air stream can be alwayschanged, and as compared with the conventional indoor fan forcontrolling stepwise, the temperature distribution in the room can bemade more uniform.

[0147] The chaos signal generating circuit 1 in FIG. 18 is composed ofan electric circuit for generating a chaos signal. In a specificconstitution, for example, formula (5) may be calculated bymicrocomputer to produce a signal, or an electric circuit in FIG. 22 asmentioned in Chapter 2 of the publication “Chaos-Foundation andApplication of Chaos-” (ed. by Kazuyuki Aihara, Science Co.). The signalgenerated from the chaos signal generating circuit 1 may be an on/offsignal as shown in FIG. 23, a signal as time series signal with pulseintervals t1, t2, . . . as chaos, or a signal by intermittent chaos.

[0148] The indoor fan drive device 2 in FIG. 18 is an apparatus forvarying the rotating speed of the indoor fan 108 according to the outputof the chaos signal generating circuit 1 and the output of the sensor110, and for example, according to the formula below, the rotating speedof the indoor fan 108 is changed.

Rotating speed of the indoor fan=K1*(target temperature−temperaturedetected from sensor)+K2*output of chaos signal generating circuit

[0149] where K1 and K2 are constants. By performing such calculation inthe indoor fan drive device 2, the chaos component can be added to themotion of the indoor fan, and the indoor fan can be set in variousstates of motion. As a result, cold air (or hot air) from theair-conditioner is distributed throughout the room, and the temperaturedistribution in the room can be set uniform same as in the pie kneadingconversion.

[0150] Thus, according to the embodiment, by rotating the indoor fanaccording to the chaos signal, the indoor temperature distribution canbe kept uniform, and uniform air-conditioning without uneven temperatureis realized. Besides, by making the room temperature uniform, excessiveair-conditioning can be avoided, and the power consumption of the entireair-conditioner can be decreased, so that the energy can be saved.

[0151] In the embodiment, the rotating speed of the indoor fan 108 ischanged by the chaos signal, but by using the wind direction plate drivedevice 10 as shown in FIG. 24, it may be constituted to move the winddirection plate up and down, and the chaos signal generating circuit 1may be connected to the wind direction drive device 10 to vary the angleand angular velocity of the wind direction plate 109 by chaos signal, sothat the same effects may be obtained. In FIG. 24, there is only thewind direction plate 109 for varying the wind blowing direction in thevertical direction (up and down), but similar effects are obtained byusing a wind direction plate for further varying the wind blowingdirection in the horizontal direction (right and left) to change theangle or angular velocity of the wind direction plate depending on theoutput of the chaos signal generating circuit 1.

[0152] In addition, same effects are obtained by connecting the chaossignal generating circuit 1 to the compressor control device 112 asshown in FIG. 25, and varying the output of the compressor 101 accordingto the output of the chaos signal generating circuit 1.

[0153] The embodiment relates to an example of air-conditioner, but itholds true in other air-conditioning devices such as oil fan heater,ceramic heater, and electric stove, and the room temperature can be setuniform by controlling the indoor fan or wind direction plate accordingto the chaos signal.

[0154]FIG. 26 is a structural diagram of an air-conditioning equipmentin a seventh embodiment of the invention, specifically showing theconstitution of an air-conditioner.

[0155]FIG. 26 shows the cooling operation of the air-conditioner, inwhich reference numeral 101 denotes a compressor, 102 is a four-wayvalve, 103 is an outdoor heat exchanger, 104 is an outdoor fan, 105 isan outdoor fan rotating speed changeover device, 106 is a capillarytube, 107 is an indoor heat exchanger, 108 is an indoor fan, 109 is awind direction plate, 112 is a compressor control device, 1 is a chaossignal generating circuit, and 111 is an indoor fan rotating speedchangeover device, and so far these are same as in the constitution ofthe sixth embodiment.

[0156] What differs from the sixth embodiment is the provision ofpyroelectric infrared rays array detector for detecting the temperaturedistribution in the room as sensor 110′, a regular signal generatingcircuit 20 for generating a regular signal depending on the output ofthe sensor 110′, and a signal changeover circuit 21 for changing overthe output of the chaos signal generating circuit 1 and output of theregular signal generating circuit 20.

[0157] As mentioned in the sixth embodiment, by driving the indoor fan108 or wind direction plate 109 according to the chaos signal, theindoor temperature distribution may be made uniform.

[0158] In the actual air-conditioner, however, it may be insufficient tocontrol to keep the temperature distribution uniform. For example, whenstarting up the air-conditioner, when the target temperature and thetemperature detected by the sensor are widely apart, it takes time tocool (in the case of cooling) the entire room uniformly, the user mayfeel more comfortable when the cold air is blown in an occupiedposition, rather than by starting with uniform air-conditioning inconsideration of the entire room.

[0159] To cope with such case, in this embodiment, the signal from thechaos signal generating circuit 1 and the signal from the regular signalgenerating circuit 20 are changed over by the signal changeover circuit21 and fed into the wind direction plate drive device 10, so that thewind direction plate 109 is controlled by changing over in the chaoticstate or regular state. A practical operation of the embodiment isdescribed below.

[0160] The sensor 110′ is composed of a pyroelectric array detector andits signal processing circuit, and by detecting the indoor temperaturedistribution, an approximate position of a person present in the room(the higher temperature region), and the average temperature in the roomcan be detected (Japanese Patent Application No. 4-254302).

[0161] The signal changeover circuit 21 selects either the chaos signalor the regular signal according to the average temperature signalproduced from the sensor 110′ and the target temperature of theair-conditioner. More specifically, the regular signal is selected whenthe difference between the target temperature of the air-conditioner andthe actual temperature detected by the sensor 110′ is greater than aspecific value, and the chaos signal is selected when the difference issmaller than the specific value.

[0162] The regular signal generating circuit 20 produces a signal formoving the wind direction plate 109 regularly up and down, and right andleft, around the direction of the higher temperature distribution (inthe case of cooling) according to the signal from the sensor 110 inorder to aim the wind to the place likely occupied by person. By thissignal, spot air-conditioning around the occupied place can be realized.

[0163] The chaos signal generating circuit 1 is same as in the sixthembodiment.

[0164] In such constitution, if there is any difference between thetarget temperature and the present temperature as in starting time ofthe air-conditioner, spot air-conditioning is applied to the regionlikely to be occupied by person as detected by the sensor 110′, and whenthe average temperature of the room is close to the target temperature,the wind direction plate 109 is driven in chaotic state. Hence, morecomfortable air-conditioning is realized.

[0165] The wind direction plate 109 in FIG. 26 is for rotating in thevertical (up-down) direction only, but it may be rotated in thehorizontal (right-left) direction.

[0166]FIG. 27 is a structural diagram of an air-conditioning equipmentin an eighth embodiment of the invention, specifically showing theconstitution of an air-conditioner.

[0167]FIG. 27 shows the cooling operation of the air-conditioner, inwhich reference numeral 101 denotes a compressor, 102 is a four-wayvalve, 103 is an outdoor heat exchanger, 104 is an outdoor fan, 105 isan outdoor fan rotating speed changeover device, 106 is a capillarytube, 107 is an indoor heat exchanger, 108 is an indoor fan, 109 is awind direction plate, 110 is a sensor for detecting the indoortemperature or humidity, and 112 is a compressor control device, and sofar they are same as in the constitution of the prior art.

[0168] What differs from the prior art is that a fractal dimensioncalculating circuit 31 for determining the fractal dimension for theoutput signal of the sensor 110 is provided.

[0169] The fractal dimension is an extended concept of the ordinarydimension, and a non-integer dimension exists. The fractal dimensionindicates the self-similarity or complexity of the input time seriessignal, and when the degree of freedom of the object system is high andthe behavior is complicated, the value is large, or in the case of asimple and regular signal, to the contrary, the value is small. It isknown, incidentally, that the fractal dimension to the signal in chaoticstate is a non-integer.

[0170] By thus calculating the fractal dimension to the time seriessignal produced from the sensor 110, the information about the motion orentry or departure of the people in the room where the air-conditioneris installed can be obtained.

[0171] For example, in a room where people always enter or leaveirregularly, the value of the fractal dimension to the output signal ofthe temperature sensor is large, whereas in the room where people enterand leave relatively less and regularly, and the activity of the peopleis low, the value of the fractal dimension is small.

[0172] Therefore, by calculating the fractal dimension relatively to theoutput signal of the sensor 110, a comprehensive index showing thefrequency of people entering or leaving the room where theair-conditioner is installed or changes of the activity of people can beobtained.

[0173] As the fractal dimension, hitherto, information dimension,capacity dimension, correlation dimension, and others have beenproposed. (See T. S. Parker, L. O. Chua: Practical Numerical Algorithmfor Chaotic System, Springer-Verlag, 1989.) In this embodiment, thefractal dimension calculating circuit 31 is explained by referring tocorrelation dimension.

[0174] The correlation dimension was proposed by Gassberger andProcassia in 1983, and is determined by using the correlationintegration in the following formula. $\begin{matrix}{{C(r)} = {\frac{1}{N*N}{\sum\limits_{i,j}^{N}{H\left( {r - {{{X(i)} - {X(j)}}}} \right)}}}} & (6)\end{matrix}$

[0175] where H denotes the Heaviside function, and X(i) is a time seriesvector, which is defined below, and N denotes the number of time seriesvectors.

X(i)=x(i), x(i+T), x(i+2T), . . . , x(i+(d−1)T)  (7)

[0176] where x(i) is the output of the sensor 110 at time i, d denotesthe dimension of the time series vector, T is the time delay, and d, tare set at proper values.

[0177] When the correlation integration C(r) possesses the followingrelation, D is called the correlation dimension.

log C(r)=D log r+Q  (8)

[0178] where Q is a constant. Therefore, to determine the correlationdimension, the proportional constant D is determined by applying theleast square method to the data of log C(r) and log r. The determined Dis an approximate value of the correlation dimension.

[0179] The fractal dimension calculating circuit 31 is composed ofmicrocomputer, and the output signals from the sensor 110 are alwaysstored in a specific quantity in time series in the memory in themicrocomputer, and the calculation of formula (6) and the least squarecalculation on log C(r) and log r are performed, and the correlationdimension D is determined.

[0180] The fractal dimension calculated by the fractal dimensioncalculating circuit 31 is entered in the indoor fan drive device 2 andcompressor drive device 112. As mentioned above, when a fractaldimension of high value is obtained, the room is frequented by manypeople and is large in the change of activity of people, and thereforethe indoor fan drive device 2 powerfully drives the indoor fan 108, andthe compressor control circuit 112 more frequently drives the compressor101. To the contrary, when the fractal dimension is small, the indoorfan 108 and compressor 101 are driven weakly.

[0181] Thus, according to the embodiment, the fractal dimension isdetermined for the time series signal produced from the sensor 110 byusing the fractal dimension calculating circuit 31 and the indoor fan108 and compressor 101 are controlled according to the value, so thatthe intensity of cooling and heating, and volume of wind blow can bevaried minutely.

[0182] In the embodiment, the correlation dimension is employed as thecalculating method of fractal dimension in the fractal dimensioncalculating circuit 31, but calculating methods of other dimensions suchas information dimension and capacity dimension may be similarlyemployed. In the embodiment, moreover, the wind direction plate isfixed, but it may be movable as in the sixth embodiment, so as to bevariable depending on the value of the fractal dimension calculatingcircuit 31.

[0183]FIG. 28 is a structural diagram of an air-conditioning equipmentin a ninth embodiment of the invention, specifically showing aconstitution of a refrigerator. The refrigerator, like theair-conditioners mentioned above, is designed to cool the food bygenerating a cold air by circulating a compressed refrigerant through aheat exchanger or a capillary tube.

[0184] Reference numeral 51 in FIG. 28 denotes a compressor forcompressing refrigerant such as CFC, 52 is a condenser which is a heatexchanger for releasing the heat of the refrigerant to outside, 53 is acapillary tube composed of a fine copper pipe for passing the highpressure refrigerant supplied from the condenser 52 through a narrowpassage to apply pressure so as to lower the pressure of therefrigerant, 54 is an evaporator which is a heat exchanger for replacingthe heat of the refrigerant with the heat in the freezing compartment,55 is a freezing compartment fan for agitating the cold air in thefreezing compartment, 56 is a freezing compartment sensor for detectingthe temperature in the freezing compartment, 57 is a cold air inflowadjusting device for controlling the flow rate of the cold air generatedin the evaporator 54 flowing out from the freezing compartment into therefrigerator, 58 is a refrigerating compartment fan for agitating thecold air in the refrigerating compartment, 59 is a refrigeratingcompartment sensor for detecting the temperature in the refrigeratingcompartment, 60 is a compressor control circuit for controlling theoutput of the compressor 51 according to the detection results of thefreezing compartment sensor 56 and refrigerating compartment sensor 59,61 is a fan drive circuit for controlling the operation of the freezingcompartment fan 55 and refrigerating compartment fan 58, 62 is an inflowcontrol circuit for controlling the inflow of the cold air by sending asignal to the cold air inflow adjusting device 57, and 1 is a chaossignal generating circuit same as mentioned in the foregoingembodiments. The thick line in the diagram indicates the pipe throughwhich the refrigerant passes.

[0185] In thus constituted refrigerator, the food is refrigerated andfrozen in the following procedure.

[0186] 1. The refrigerant is compressed by the compressor 51, and therefrigerant is set in high temperature, high pressure state.

[0187] 2. The refrigerant at high temperature, high pressure is sentinto the condenser 52 to release heat, and the refrigerant is liquefied.

[0188] 3. The cooled high pressure liquid refrigerant is passed into thecapillary tube 53, and the pressure of the refrigerant is lowered.

[0189] 4. The refrigerant lowered in pressure is evaporated in theevaporator 54. The refrigerant, when being evaporated, deprives of heatof vaporization, and the air in the evaporator 54 and its vicinity iscooled below the dew point.

[0190] 5. The cooled air circulates in the freezing compartment by thefreezing compartment fan 55, and is sent into the refrigeratingcompartment. However, the volume of cold air sent into the refrigeratingcompartment is controlled by the cold air inflow adjusting device 57 Inthe refrigerating compartment, the refrigerant compartment fan 58 isoperated in order to diffuse the cold air in the compartmentsufficiently.

[0191] 6. The refrigerant vaporized in the evaporator 54 is led into thecompressor 51, and the operation goes back to step 1.

[0192] The food can be cooled in this procedure.

[0193] In the conventional refrigerator, the fan rotation was alwaysconstant, and the cold air circulates only a same route, and an uneventemperature distribution occurred in the freezing compartment andrefrigerating compartment, and excessively cooled area and uncooled areacoexisted in the same compartment.

[0194] To solve this problem of uneven temperature, the inventionrealizes uniform freezing and refrigerating without uneven temperaturedistribution by varying the rotation of the freezing compartment fan 55and refrigerating compartment fan 58 by chaos signal.

[0195] As explained in the sixth embodiment, the chaos signal has a copyimage like pie kneading conversion as basic characteristic, and ischaracterized by trajectory instability, never taking the same stateagain. Therefore, by varying the rotation of the freezing compartmentfan 55 and refrigerating compartment fan 58 by chaos signal, the coldair circulation route in the freezing and refrigerating compartments canbe always changed. In this case, the change of cold air circulationroute is not regular, but conforms to the chaos signal having trajectoryinstability, so that the circulation route of cold air appears to changerandomly.

[0196] By such chaotic change of circulation route of the cold air,preservation of food at uniform temperature may be sufficientlyrealized.

[0197] As a specific constitution, according to the signal generated bythe chaos signal generating circuit 1, the fan driving circuit 61controls the freezing compartment fan 55 and refrigerating compartmentfan 58, so that the flow of cold air is changed chaotically. The chaossignal generating circuit 1 is constituted same as in the sixthembodiment, or may be composed of an electric circuit as shown in FIG.22, or a signal may be generated by a method of calculating a functionsuch as Bernoulli shift by using a microcomputer.

[0198] Thus, according to the embodiment, using the chaos signalgenerating circuit 1, by controlling the freezing compartment fan 55 andrefrigerating compartment fan 58 according to the signal, thecirculation route of cold air in the freezing and refrigeratingcompartments can be changed variously, and the temperature distributionin the compartments may be made uniform. Besides, by chaotic drive, thetemperature in the freezing compartment and refrigerating compartment isuniform, and generation of excessive cold air is not necessary, so thatthe power consumption of the refrigerator may be saved more than before.

[0199] In the embodiment, only the freezing compartment fan 55 andrefrigerating compartment fan 58 are driven by chaos signal, but theoperation of the cold air inflow adjusting device 56 and compressor 51may be controlled according to the chaotic signal, too. In such a case,preservation of food at more uniform temperature than in the embodimentis realized. As chaos signal, an on/off signal as shown in FIG. 23having a chaotic pulse width may be also used.

[0200]FIG. 29 is a structural diagram of an air-conditioning equipmentin a tenth embodiment of the invention, specifically showing theconstitution of a refrigerator.

[0201] In FIG. 29, reference numeral 51 is a compressor, 52 is acondenser, 53 is a capillary tube, 54 is an evaporator, 55 is a freezingcompartment fan, and 56 is a freezing compartment sensor. So far, theyare same as in the constitution in the ninth embodiment. Besides,reference numeral 1 denotes a chaos signal generating circuit, and 2 isa regular signal generating circuit, which are same as those shown inthe foregoing embodiments. In this embodiment, what differs from theconstitution of the ninth embodiment is that a refrigerating compartmentfan 71, a cold air inflow adjusting device 72, and a refrigeratingcompartment sensor 73 are each provided in a plurality and distributedand disposed on each rack in the refrigerating compartment, and that theconstitution further comprises a multi-fractal dimension calculatingcircuit 76 for calculating the individual fractal dimensions from theoutputs of the freezing compartment sensor 58 and refrigeratingcompartment sensors 73-1 to 73-4, a multi-fan driving circuit 74 forcontrolling the freezing compartment fan 55 and refrigeratingcompartment fans 71-1 to 71-4 according to the signals from the freezingcompartment sensor 55, refrigerating compartment sensor 73, andmulti-fractal dimension calculating circuit 76, depending on the outputof either the chaos signal generating circuit 1 or regular signalgenerating circuit 20, and a multi-inflow control circuit 75 forcontrolling the cold air inflow adjusting devices 72-1 to 72-4 accordingto the signals from the freezing compartment sensor 55, refrigeratingcompartment sensor 73, and multi-fractal dimension calculating circuit76, depending on the output of either the chaos signal generatingcircuit 1 or regular signal generating circuit 20.

[0202] In the foregoing ninth embodiment, it is controlled with thepurpose of keeping uniform the temperature in the refrigerator. In therefrigerator, maintenance of uniform temperature is most important, butcontrol to keep uniform temperature only involves certain problems.

[0203] For example, in a sufficiently uniformly cooled refrigeratingcompartment, suppose a warm food is put on one rack. In this case, thefan in the refrigerating compartment operates to make uniform thetemperature of the entire refrigerating compartment, and the temperaturepropagation in the room is promoted, and the temperature goes on risingaround the warm food, and as the time passes, the temperature risespreads around the whole compartment, and then this temperature rise isdetected by the sensor, and the cold air from the freezing compartmentis increased, and the temperature drops on the whole, thereby returningto the state before putting in the warm food.

[0204] Therefore, ever time a new food is put in, the temperature of theentire refrigerating compartment varies, which may adversely affect thefood preservation state.

[0205] To solve this problem, in this embodiment, on each rack in therefrigerating compartment, the refrigerating compartment sensor 73, coldair inflow adjusting device 72, and refrigerating compartment fan 71 areprovided, and the temperature is always detected on each rack, and therack higher in temperature than the other racks is exposed to cold airby regularly operating the refrigerating compartment fan 71, so that theparticular rack is cooled quickly. When the temperature is almost equalon each rack, each refrigerating compartment fan is driven by chaossignal, so that the compartment temperature may be kept uniform.

[0206] As a specific operation, the temperature on each rack is detectedby the refrigerating compartment sensors 73-1 to 73-4, and theinformation is put in the multi-fractal dimension calculating circuit76. The multi-fractal dimension calculating circuit 76 is composed sameas the fractal dimension calculating circuit 31 explained in the eighthembodiment, and the different point is only that plural input signalsare used. By this multi-fractal dimension calculating circuit 76, thefractal dimension is calculated from the data produced from therefrigerating compartment sensors 73. By this fractal dimension, it isknown which rack is large in temperature change and high in frequency oftemperature change. Therefore, by calculating the fractal dimension,specifically, the feature amounts showing the information about thefrequency or volume of putting in and taking out the food on each rack.

[0207] The fractal dimension of temperature data on each rack obtainedby the multi-fractal dimension calculating circuit 76, and the presenttemperature data on each rack are entered in the multi-inflow controlcircuit 75 and multi-fan driving circuit 74, thereby driving andcontrolling the cold air inflow adjusting circuits 72-1 to 72-4 andrefrigerating compartment fans 73-1 to 73-4 installed on each rack.

[0208] As a basic control, the rack presently high in temperature or therack high in fractal dimension is filled with more cold air by means ofthe cold air inflow adjusting device 72. Moreover, the refrigeratingcompartment fan 71 on that rack is driven by the regular signalgenerating circuit 20, and the fan is controlled so that cold air may bedirectly applied to the warm food. By this operation, spot cooling ofcooling a particular food quickly and locally is realized.

[0209] On the other hand, the rack close to the target temperature orthe rack small in fractal dimension is exposed to less cold air flow,and the refrigerating compartment fan 71 is operated according to theoutput of the chaos signal generating circuit 1, thereby controlling tohave a uniform temperature distribution in the entire refrigeratingcompartment. These practical controls of fans and cold air inflowadjusting device are effected by the multi-fan driving circuit 74 andmulti-inflow control circuit 75.

[0210] In this way, the refrigerating compartment fans 71-1 to 71-4,cold air inflow adjusting devices 72-1 to 72-4, and refrigeratingcompartment sensors 73-1 to 73-4 are provided on the racks of therefrigerating compartment, and by changing over the driving state of therefrigerating compartment fans 71-1 to 71-4 between chaotic state andregular state, the control for making uniform the temperature in theentire refrigerating compartment and the control for spot cooling ofeach rack can be changed over. For changeover of the controls, not onlythe present temperature detected from the outputs of the refrigeratingcompartment sensors 73-1 to 73-4, but also the fractal dimensionscalculated from the sensor outputs are used. Therefore, control inconsideration of volume of food putting in and taking out can be alsorealized.

[0211] Similar effects are obtained by changing over the driving stateof the cold air inflow adjusting devices 72-1 to 72-4 between chaoticstate and regular state, same as in the refrigerating compartment fans71-1 to 71-4.

[0212]FIG. 30 is a structural diagram of an air-conditioning equipmentin an eleventh embodiment of the invention, specifically showing theconstitution of an electric fan.

[0213] In FIG. 30, reference numeral 80 is a fan composed of propellerand motor, and 81 is a fan driving circuit for feeding an electric powerto drive the fan and controlling the rotating speed of the fan.Reference numeral 1 is a chaos signal generating circuit same as in theconstitution in FIG. 6.

[0214] In this embodiment, same as in the sixth embodiment, a uniformair-conditioning is realized by chaotically changing the rotating speedof the fan 80 by using the chaos signal generating circuit 1.

[0215] As explained also in the sixth embodiment, the chaos signal has amapping like pie kneading conversion as basic characteristic, and ischaracterized by trajectory instability, never repeating the same statechange again. Therefore, by varying the output of the fan 85 accordingto the chaos signal, the wind intensity and wind circulation route inthe room can be always changed, so that a uniform air-conditioning isrealized.

[0216] Thus, according to the embodiment, using the chaos signalgenerating circuit 1, by controlling the fan 80 of the electric fanaccording to the signal, the wind intensity of the fan and thecirculation route of the wind can be changed variously, and thetemperature distribution in the room can be made uniform. In theembodiment, only the rotation of the fan 80 is changed by chaos signal,but similar effects are obtained by varying the swing rotation of theelectric fan by chaos signal.

[0217]FIG. 31 is a structural diagram of an air-conditioning equipmentin a twelfth embodiment of the invention, specifically showing theconstitution of an electric heated table.

[0218] In FIG. 31, reference numeral 82 is a table, 83 is a heater builtin the back of the table, 84 is a heater drive unit for feeding electricpower necessary for heat generation to the heater 83 and controlling theheat generation output of the heater 83, 85 is a fan for agitating theair in the electric heated table, 86 is a fan drive unit for driving andcontrolling the fan 85, 87 is a table top plate, and 88 is a blanket.Reference numeral 1 is a chaos signal generating circuit, same as in theconstitution in the sixth embodiment.

[0219] In this embodiment, same as in the sixth embodiment, the heatgeneration output of the heater 83 and the air flow rate of the fan 85are chaotically changed by using the chaos signal generating circuit 1.Thus, a uniform heating is realized. As explained also in the sixthembodiment, the chaos signal has a mapping like pie kneading conversionas basic characteristic, and is characterized by trajectory instability,never repeating the same state change again. Therefore, by varying theoutput of the heater 83 and output of the fan 83 according to the chaossignal, the temperature, intensity of hot air, and circulation route ofhot air in the electric heated table are always changed, so that auniform heating is realized.

[0220] Thus, according to the embodiment, using the chaos signalgenerating circuit 1, by controlling the heater 82 and fan 85 of theelectric heated table according to the signal, the intensity andcirculation route of hot air in the electric heated table may be changedvariously, so that the temperature distribution in the electric heatedtable may be made uniform.

[0221] As the signal of chaos signal generating circuit 1, incidentally,an on/off signal as shown in FIG. 23 may be used, and its pulse widthmay be varied chaotically, or an intermittent chaos signal may be used.As a heating apparatus using similar heater, an electronic carpet asshown in FIG. 32 is known, and the principle is the same. In FIG. 32,reference numeral 90 denotes a heater, 91 is a carpet heated by theheater, 92 is a heater drive unit for feeding electric power necessaryfor heat generation to the heater 90, and controlling the heatgeneration output, and 1 is a chaos signal generating circuit same as inthe sixth embodiment. By controlling the heat generation output of theheater 90 according to the chaos signal produced from the chaos signalgenerating circuit 1, heating without uneven temperature profile isrealized same as in the electric heated table. The same effect isobtained in other heating devices using the heater, including the oilfan heater, ceramic fan heater, electric stove, and electric blanket,and uniform heating is realized by controlling the heater chaotically.

[0222]FIG. 33 is a structural diagram of a thirteenth embodiment of theinvention, specifically showing the constitution of a microwave oven.

[0223] In FIG. 33, reference numeral 101 denotes a magnetron forgenerating microwaves, 102 is a magnetron driving circuit composed of apower source circuit and a control circuit for driving the magnetron101, 103 is a waveguide for guiding the microwaves generated by themagnetron 101 into a heating compartment in which the food is contained,104 is a table for putting the food on, and 106 is a stirrer fan foragitating the microwaves coming out from the waveguide 103, and theseare so far same as those in the existing microwave oven. What differsfrom the prior is the provision of a chaos signal generating circuit 1for generating a chaos signal, and a stirrer fan drive unit 2 forcontrolling the rotation of the stirrer fan 106 according to the outputof the chaos signal generating circuit 1.

[0224] As explained also in the sixth embodiment, the chaos signal has amapping like pie kneading conversion as basic characteristic, and ischaracterized by trajectory instability, never repeating the same statechange again. In proportion to such chaos signal, the stirrer fan 106 ofthe microwave oven is rotated, and the stirrer fan 106 operates invarious modes, so that the microwaves in the compartment can be agitatedsufficiently. Therefore, as compared with the conventional microwaveoven having a stirrer fan rotating at a specific speed, a more uniformdistribution of electric field in the compartment is obtained.

[0225] The chaos signal generating circuit 1 in FIG. 33 is composed ofan electric circuit for generating a chaos signal. In specificconstitution, for example, the signal may be produced by calculatingformula (5) by microcomputer, or an electric circuit as in FIG. 22 maybe used. As the chaos signal to be generated from the chaos signalgenerating circuit 1, an on/off signal as shown in FIG. 23 may be used,and its pulse intervals t1, t2, . . . may be time series signals ofchaos.

[0226] The stirrer fan drive unit 2 in FIG. 33 is a device for varyingthe rotating speed of the stirrer fan in proportion to the output of thechaos signal generating circuit 1. By putting the motion of the stirrerfan in chaotic state by the stirrer fan drive unit 2, the stirrer fancan be put in various operating states. As a result, the microwaves inthe compartment may be sufficiently agitated, and the distribution ofelectric field in the compartment may be made uniform, same as in thepie kneading conversion.

[0227] Thus, according to the embodiment, the rotating speed of thestirrer fan 106 is varied by the chaos signal, and same effects areobtained by connecting the chaos signal generating circuit 1 to thetable drive unit 3 for rotating the table 104 as shown in FIG. 34, andchanging the rotating speed or rotational angle of the table 104 by thechaos signal. Besides, as shown in FIG. 35, by connecting the magnetrondriving circuit 102 to the chaos signal generating circuit 1, theintensity of the produced microwaves may be varied according to thechaos signal.

[0228] The thirteenth embodiment relates to the microwave oven, but sameeffects are obtained in an oven-toaster as shown in FIG. 36. FIG. 36shows an oven-toaster, in which reference numeral 21 denotes an upperheater for heating the bread in the heating compartment from above, 22is a lower heater for heating the bread from beneath, 23 is a powersource circuit for feeding electric power to the upper heater 21 andlower heater 22, 24 is an output control circuit for controlling theoutput of the power source circuit 23, and 1 is a chaos signalgenerating circuit same as in the foregoing embodiments. In thisexample, according to the chaos signal generated from the chaos signalgenerating circuit 1, the output control circuit 24 controls the outputof the power source circuit 23, and the outputs of the two heaters arechanged chaotically. Hence, same as in the above embodiment, uniformheating is realized.

[0229]FIG. 37 is a structural diagram of a heating apparatus in afourteenth embodiment of the invention, specifically showing theconstitution of a rice cooker.

[0230] In FIG. 37, reference numeral 31 is an inner bowl for holdingrice and water, 32 is a lid for enclosing the inner bowl, 33 is a heaterfor heating the inner bow 31, 34 is a power source circuit for feedingelectric power necessary for heat generation to the heater 33, 35 is anoutput control circuit for controlling the output of the power sourcecircuit 34 for changing the heating output, and 1 is a chaos signalgenerating circuit for generating a chaos signal same as used in thesixth embodiment.

[0231] The rice cooker is intended to cook rice by operating the rice inthe inner bowl in four sequentially steps of process consisting of waterabsorption, boiling, maintenance of boiling, and steaming. Accordingly,the heater 33 disposed around the inner bowl (lower, side or topsurface) heats the rice in the inner bowl with various outputs dependingon the steps of the process.

[0232] Recently, a new rice cooker is developed, in which severaltemperature sensors are provided on the inner circumference or outercircumference of the inner bowl, and the volume of rice is judged on thebasis of the temperature information obtained from the sensors, and theheating output of the heater in each step of process is determined fromthe obtained volume.

[0233] Once the heating output is determined, however, the heatingoutput at each step of process is fixed, and the heater output does notchange in the process.

[0234] In the inner bowl, as heated by the heater 33, water (hot water)circulates among rice grains. The direction of circulation is mainlyvertical, and the water circulation is particularly violent in theprocess of boiling and maintenance of boiling. By such circulation ofwater, the rice temperature in the inner bowl is kept uniform.

[0235] Conventionally, however, since the output of the heater 33 iskept constant at each step of the process, once the circulation route ofwater (hot water) is determined depending on the physical configurationof rice grains and heater position, the route is not changed, and therice close to the route is overcooked, and the rice remote from theroute is undercooked, and uneven cooking occurs.

[0236] This phenomenon is particularly notable at the steps of boilingand maintenance of boiling in which the heating output is large andwater circulation is violent, and a significant uneven cooking is causedin a rice cooker with inappropriate design of heater position or shape.

[0237] To solve the problem of uneven cooking, in the invention, theoutput of the heater 33 is changed by chaos signal, and uniform cookingwithout uneven heating is realized.

[0238] As explained also in the sixth embodiment, the chaos signal has amapping like pie kneading conversion as basic characteristic, and ischaracterized by trajectory instability, never repeating the same statechange again. Therefore, by changing the output of the heater 33according to the chaos signal, the water circulation route in the innerbowl 31 may always changed. Besides, the change of water (hot water)circulation route is not regular, but conforms to the chaos signalhaving trajectory instability. Hence, the water circulation routeappears to change variously at random.

[0239] By such chaotic change of water circulation route, a sufficientlyuniform rice cooking is realized.

[0240] As a practical constitution, the output control circuit 35controls the power source circuit 34 according to the signal generatedby the chaos signal generating circuit 1, and the heater output ischanged chaotically. The chaos signal generating circuit 1 isconstituted same as in the sixth embodiment, and an electric circuit asshown in FIG. 22 may be used, or a signal may be generated by a methodof calculating a function such as Bernoulli shift by using amicrocomputer or the like.

[0241] Thus, according to the embodiment, using the chaos signalgenerating circuit 1, by controlling the heater 33 of the rice cookeraccording to the signal, the water circulation route in the inner bowlmay be changed variously, and the rice temperature distribution may bemade uniform. Hence uniform rice cooking without uneven heating isrealized.

[0242] Incidentally a rice cooker by making use of induction heat ofinner bowl by using a magnetic force generating coil as heater 33 isdeveloped. In such rice cooker, too, by changing the heating outputchaotically by using the chaos signal generating circuit 1, uniformcooking without uneven heating as in this embodiment may be realized.

[0243]FIG. 38 is a structural diagram of a heating apparatus in afifteenth embodiment of the invention, specifically showing theconstitution of a hot plate.

[0244] In FIG. 38, reference numeral 41 is a metal plate for putting thefood on, 42 is a heater for heating the metal plate 41, 43 is a powersource circuit for feeding electric power necessary for generating heatto the heater 42, 44 is an output control circuit for controlling theoutput of the power source circuit 43 for changing the heat generationoutput of the heater 42, and 1 is a chaos signal generating circuit forgenerating a chaos signal same as in the sixth embodiment.

[0245] On the lower side of the metal plate 41, plural heaters 42 aredisposed as shown in the diagram, and the metal plate 41 is heated asthe electric power is supplied to each heater 42 through the powersource circuit 53.

[0246] In an ordinary hot plate, the heaters 42 are often disposed atseveral positions of the metal plate as shown in the diagram, nevercovering the entire metal plate surface. Therefore, a heat distributionoccurs on the metal plate.

[0247] In this embodiment, same as in the sixth embodiment, bychaotically changing the heating output of the heater by using the chaossignal generating circuit 1, uniform heating is realized.

[0248] As explained also in the sixth embodiment, the chaos signal has amapping like pie kneading conversion as basic characteristic, and ischaracterized by trajectory instability, never repeating the same statechange again. Therefore, by changing the output of the heater 42according to the chaos signal, the temperature of the parts of the metalplate 41 and the heat propagation speed are always changed, so that auniform heating is realized.

[0249] Thus, according to the embodiment, using the chaos signalgenerating circuit 1, by controlling the heater 42 of the hot plateaccording to the signal, the heat distribution on the metal plate may bechanged variously, and the temperature distribution on the metal platemade uniform. Hence, cooking without uneven heating is realized.

[0250] As the signal of the chaos signal generating circuit 1, an on/offsignal as shown in FIG. 23 may be used, and the pulse width may bevaried chaotically. In this case, too, the heater is on/off controlled,but the temperature of the parts of the metal plate changes smoothlybecause of the heat capacity of the metal plate. Accordingly, if thesignal as in FIG. 23 is used, uniform heating is possible.

[0251]FIG. 39 is a structural diagram of a heating apparatus in asixteenth embodiment of the invention, specifically showing theconstitution of an electromagnetic cooking apparatus.

[0252] In FIG. 39, reference numeral 50 is a magnetic force generatingcoil, 51 is a high frequency current generating circuit composed of apower source circuit for producing a high frequency current to besupplied to the magnetic force generating coil 50, and 52 is an outputcontrol circuit for controlling the output of the high frequency currentproduced from the high frequency current generating circuit 51.Reference numeral 1 in FIG. 39 is a chaos signal generating circuit,which is same as in the sixth embodiment.

[0253] The electromagnetic cooking apparatus is a heating device forcooking by passing an eddy current in a pan by an alternating magneticforce generated by the magnetic force generating coil 50, and making useof the heat generation (induction heating) by the metal resistance ofthe pan.

[0254] Similar to the hot plate in the fifteenth embodiment, the problemof the electromagnetic cooking apparatus is that the heating is notsufficiently uniform. In the electromagnetic cooking apparatus, sincethe pan itself is heated, the magnitude and distribution of the eddycurrent induced on the pan vary significantly depending on the panshape, material and thickness, in particular, the contact state betweenthe pan bottom and the main body. Hence, uneven cooking occurred in thistype of electromagnetic cooking apparatus.

[0255] In this embodiment, same as in the foregoing embodiments, theoutput of the high frequency current generating circuit 51 is changedchaotically by using the chaos signal generating circuit 1, so thatuniform heating and cooking may be realized. As explained also in thesixth embodiment, the chaos signal has a mapping like pie kneadingconversion as basic characteristic, and is characterized by trajectoryinstability, never repeating the same state change again. Therefore, byvarying the output of the high frequency current generating circuit 51according to the chaos signal, the magnitude of the eddy current in theparts of the pan, and the heat conduction state are always changed, sothat a uniform heating is enabled.

[0256] Thus, according to the embodiment, using the chaos signalgenerating circuit 1, by controlling the high frequency currentgenerating circuit 51 according to the signal, the magnitude of the eddycurrent induced in the pan and the heat conduction state can bevariously changed, and hence the temperature distribution in the pan maybe made uniform. As a result, uniform cooking without uneven heating isrealized.

[0257] As the signal of the chaos signal generating circuit 1,incidentally, the on/off signal as shown in FIG. 6 may be used, and thesame effects are obtained by changing the its pulse width chaotically.

[0258] According to the invention, as described herein, by putting theobject machine in chaotic state, uniform washing, air-conditioning,heating or the like may be realized.

What is claimed is:
 1. A fluid control apparatus for controlling a fluidsuch as water stream and air stream, comprising: an control device bywhich the fluid characteristic such as positional distribution of thefluid, flow velocity, and fluid trajectory is set in chaotic state byadjusting at least one constituent element of constituent elements ofthe apparatus.
 2. A fluid control apparatus for controlling a fluid suchas water stream and air stream, comprising: chaos signal generatingmeans for generating a chaos signal, and a control device by which thefluid characteristic such as positional distribution of the fluid, flowvelocity, and fluid trajectory is set in chaotic state by making use ofthe chaos signal generated by the chaos signal generating means.
 3. Arotary nozzle apparatus comprising: a nozzle composed of pluralrotatable hollow links which are mutually passable through a pump forpress-feeding a fluid into the hollow links, and at least one fluidinjection port in at least one hollow link of the nozzle, wherein thefluid is injected from the injection port. while the hollow link isrotated by the force of the fluid pressurized by the pump, and themotion of the injection port is set in chaotic state by adjusting acharacteristic of the nozzle.
 4. A rotary nozzle apparatus comprising: anozzle composed of plural rotatable hollow links which are mutuallypassable through, a pump for press-feeding a fluid into the hollowlinks, and at least one fluid injection port in at least one hollow linkof the nozzle, wherein the fluid is injected from the injection portwhile the hollow link is rotated by the force of the fluid pressurizedby the pump, and a center of rotation of at least one hollow link forcomposing the nozzle is apart from a center of gravity of the own hollowlink.
 5. A rotary nozzle apparatus comprising: a nozzle composed ofplural rotatable hollow links which are mutually passable through, apump for press-feeding a fluid into the hollow links, and at least onefluid injection port in at least one hollow link of the nozzle, whereinthe fluid is injected from the injection port while the hollow link isrotated by the force of the fluid pressurized by the pump, and a play isprovided in at least one of connection parts of the hollow links, andthereby a center of rotation or a position of center of gravity of eachhollow link varies depending on strength of the flow of the fluid.
 6. Arotary nozzle apparatus comprising: a nozzle composed of pluralrotatable hollow links which are mutually passable through, a pump forpress-feeding a fluid into the hollow links, and at least one fluidinjection port in at least one hollow link of the nozzle, wherein thefluid is injected from the injection port while the hollow link isrotated by the force of the fluid pressurized by the pump, and furthercomprising a pressurizing force control circuit for varying apressurizing force of the pump according a specific pattern.
 7. A rotarynozzle apparatus comprising: a nozzle composed of plural rotatablehollow links which are mutually passable through a pump forpress-feeding a fluid into the hollow links, and at least one fluidinjection port in at least one hollow link of the nozzle, wherein thefluid is injected from the injection port while the hollow link isrotated by the force of the fluid pressurized by the pump, and furthercomprising a chaos signal generator for generating a chaos signal, and apressurizing force control circuit for varying a pressurizing force ofthe pump depending on the chaos signal of the chaos signal generator. 8.A rotary nozzle apparatus comprising: a nozzle composed of pluralrotatable hollow links which are mutually passable through, a pump forpress-feeding a fluid into the hollow links, and at least one fluidinjection port in at least one hollow link of the nozzle, wherein thefluid is injected from the injection port while the hollow link isrotated by the force of the fluid pressurized by the pump, water flowrestricting means for limiting a flow of the fluid in a specificdirection in the hollow link is provided in at least one hollow link,and the strength of flow of the fluid varies depending on the rotationposition of each hollow link.
 9. A rotary nozzle apparatus comprising: anozzle composed of plural rotatable hollow links which are mutuallypassable through, a pump for press-feeding a fluid into the hollowlinks, and at least one fluid injection port in at least one hollow linkof the nozzle, wherein the fluid is injected from the injection portwhile the hollow link is rotated by the force of the fluid pressurizedby the pump, further comprising: a sensor detecting a rotary operationcharacteristics of the nozzle, a chaos feature amount calculatingcircuit for calculating a chaos feature amount from data detected by thesensor, and a pressurizing control circuit for judging an operatingstate of the nozzle from the feature amount calculated in the chaosfeature amount calculating circuit, and varying the pressurizing forceof the pump when the nozzle is not in chaotic state, whereby theoperation of the nozzle is always kept in chaotic state.
 10. A washingmachine comprising a rotary nozzle apparatus in any one of claims 3 to9.
 11. A dish washer comprising a rotary nozzle apparatus in any one ofclaims 3 to
 9. 12. A water sprinkler comprising a rotary nozzleapparatus in any one of claims 3 to
 9. 13. A design method of a rotarynozzle apparatus which having a nozzle composed of plural rotatablehollow links which are mutually passable through a pump forpress-feeding a fluid into the hollow links, and at least one fluidinjection port in at least one hollow link of the nozzle, wherein thefluid is injected from the injection port while the hollow link isrotated by the force of the fluid pressurized by the pump, said methodcomprising steps of: detecting a rotary operation characteristic of thenozzle, calculating the largest Lyapunov exponent from the detectedrotary operation characteristic data, and determining nozzlecharacteristics so that the largest Lyapunov exponent may be positive.14. A design method of a rotary nozzle apparatus which having a nozzlecomposed of plural rotatable hollow links which are mutually passablethrough a pump for press-feeding a fluid into the hollow links, and atleast one fluid injection port in at least one hollow link of thenozzle, wherein the fluid is injected from the injection port while thehollow link is rotated by the force of the fluid pressurized by thepump, said method comprising steps of: detecting a rotary operationcharacteristic of the nozzle, calculating fractal dimension from thedetected rotary operation characteristic data, and determining nozzlecharacteristics so that the fractal dimension may be a non-integer. 15.An air-conditioning system comprising: a fan for generating an airstream to agitate the indoor air, a wind direction plate for limitingthe flowing direction of the air stream formed by the fan, a chaossignal generating circuit for generating a chaos signal, and a drivecontrol device for varying the operation characteristic of at least thefan or the wind direction plate depending on the output of the chaossignal generating circuit.
 16. An air-conditioner comprising: acompressor for compressing a refrigerant, a chaos signal generatingcircuit for generating a chaos signal, and a compressor drive controldevice for varying the operating characteristic of the compressordepending on the output of the chaos signal generating circuit.
 17. Anair-conditioner comprising: an indoor fan for generating an air streamto agitate the indoor air, a wind direction plate for limiting theflowing direction of the air stream formed by the indoor fan, a sensorfor detecting an indoor thermal characteristic, a chaos signalgenerating circuit for generating a chaos signal, a defining signalgenerating circuit for generating a defining signal depending on theoutput of the sensor, a signal changeover circuit for issuing an outputsignal of the chaos signal generating circuit when the thermalcharacteristic obtained from the output of the sensor is closer to thetarget thermal characteristic, and issuing an output signal of thedefining signal generating circuit otherwise, and a drive control devicefor varying the operation characteristic of at least the indoor fan orthe wind direction plate depending on the output of the signalchangeover circuit.
 18. An air-conditioner comprising: an indoor fan forgenerating an air stream to agitate the indoor air, a wind directionplate for limiting the flowing direction of the air stream formed by theindoor fan, a sensor for detecting the indoor thermal characteristic, afractal dimension calculating circuit for calculating a fractaldimension for the output signal of the sensor, and a drive controldevice for varying the operation characteristic of at least the fan orthe wind direction plate depending on the output of the fractaldimension calculating circuit.
 19. A refrigerator comprising: a fan foragitating a cold air in the compartment, a chaos signal generatingcircuit for generating a chaos signal, and a fan drive device forvarying the operation characteristic of the fan depending on the outputsignal of the chaos signal generating circuit.
 20. A refrigeratorcomprising: a compressor for compressing a refrigerant, a cold airinflow device for flowing an air cooled by a heat exchanger into acompartment, a cold air inflow adjusting device for adjusting the inflowof the cold air in the cold air inflow device, a chaos signal generatingcircuit for generating a chaos signal, and a drive control device forvarying the operation characteristic of at least the compressor or thecold air inflow adjusting device depending on the output signal of thechaos signal generating circuit.
 21. A refrigerator comprising: a fanfor agitating a cold air in a compartment, a sensor for detecting athermal characteristic in the compartment, a fractal dimensioncalculating circuit for calculating a fractal dimension for the outputsignal of the sensor, and a drive control device for varying theoperation characteristic of the fan depending on the output of thefractal dimension calculating circuit.
 22. A refrigerator comprising: atleast one fan for agitating a cold air in a compartment, at least onecold air inflow device for flowing the air cooled by a heat exchangerinto the compartment, a cold air inflow adjusting device for adjustingthe inflow of the cold air in each cold air inflow device, at least onesensor for detecting a distribution of thermal characteristic in thecompartment, a chaos signal generating circuit for generating a chaossignal, a defining signal generating circuit for generating a definingsignal depending on the output of the sensor, a signal changeovercircuit for issuing an output signal of the chaos signal generatingcircuit when the thermal characteristic obtained from the output of thesensor is closer to the target thermal characteristic, and issuing anoutput signal of the defining signal generating circuit otherwise, and adrive control device for controlling the operation characteristic of atleast the fan or the cold air inflow adjusting device depending on theoutput of the signal changeover circuit.
 23. An electric fan comprisinga fan for generating an air stream, a direction changing device forchanging the fan direction, a chaos signal generating circuit forgenerating a chaos signal, and a drive control device for varying theoperation characteristic of at least the fan or the direction changingdevice depending on the output of the chaos signal generating circuit.24. A heat exchanger for exchanging heat for an object to be heated oran object to be cooled, comprising: a control device by which the heatexchange characteristic of the heat exchanger, such as change of time ofheat exchange to the object to be heated or the object to be cooled isset in chaotic state by adjusting at least one element of constituentelements of the apparatus.
 25. A heat exchanger for exchanging heat ofan object to be heated or an object to be cooled, comprising chaossignal generating means for generating a chaos signal, and a controldevice by which the heat exchange characteristic of the hear exchanger,such as change of time of heat exchange to the object to be heated orthe object to be cooled is set in chaotic state by making use of a chaossignal generated by the chaos signal generating means.
 26. A heatingapparatus comprising: a heater for generating heat, a chaos signalgenerating circuit for generating a chaos signal, and a drive controldevice for varying the operation characteristic of the heater accordingto the output of the chaos signal generating circuit.
 27. A heated tablecomprising: a heater built in a back side of a table, a fan foragitating an air heated by the heater, a chaos signal generating circuitfor generating a chaos signal, and a drive control device for varyingthe operation characteristic of at least the heater or the fan dependingon the output of the chaos signal generating circuit.
 28. An electroniccarpet comprising: a heater for heating a carpet, a chaos signalgenerating circuit for generating a chaos signal, and a drive controldevice for varying the operation characteristic of the heater dependingon the output of the chaos signal generating circuit.
 29. A magneticfield control apparatus for applying an energy to an object by anelectromagnetic wave, comprising a control device by which the magneticfield characteristic such as positional distribution of electromagneticwave, magnetic flux density, and line of magnetic force is set inchaotic state by adjusting at least one element of constituent elementsof the apparatus.
 30. A magnetic field control apparatus for applying anenergy to an object by an electromagnetic wave, comprising: chaos signalgenerating means for generating a chaos signal, and a control device bywhich the magnetic field characteristic such as positional distributionof electromagnetic wave, magnetic flux density, and line of magneticforce is set in chaotic state by making use of a chaos signal generatedby the chaos signal generating means.
 31. A microwave oven comprising: aheating compartment for accommodating the material to be heated, amagnetron for generating microwaves, a magnetron driving circuitcomposed of a power source circuit for driving the magnetron, awaveguide for leading the microwaves generated by the magnetron into theheating compartment, a stirrer fan for agitating the microwaves in theheating compartment, a chaos signal generating circuit for generating achaos signal, and a stirrer fan driving circuit for rotating the stirrerfan depending on the output of the chaos signal generating circuit. 32.A microwave oven comprising: a heating compartment for accommodating thematerial to be heated, a table for putting on and rotating the materialin the heating compartment, a magnetron for generating microwaves, amagnetron driving circuit composed of a power source circuit for drivingthe magnetron, a waveguide for leading the microwaves generated by themagnetron into the heating compartment, a chaos signal generatingcircuit for generating a chaos signal, and a table driving circuit forrotating the table depending on the output of the chaos signalgenerating circuit.
 33. A microwave oven comprising: a heatingcompartment for accommodating the material to be heated, a magnetron forgenerating microwaves, a magnetron driving circuit composed of a powersource circuit for driving the magnetron, and a waveguide for leadingthe microwaves generated by the magnetron into the heating compartment,further comprising a chaos signal generating circuit for generating achaos signal, and a magnetron control circuit for varying the output ofthe magnetron depending on the output of the chaos signal generatingcircuit.
 34. A toaster comprising: a heating compartment foraccommodating the material to be heated, a heater for heating thematerial, and a power source circuit for supplying a necessary electricpower for heating to the heater, a chaos signal generating circuit forgenerating a chaos signal, and an output control circuit for varying theoutput electric power of the power source circuit depending on theoutput of the chaos signal generating circuit to vary the heat output ofthe heater.
 35. A rice cooker comprising: a bowl for accommodating riceand water, a heater disposed on the outside of the bowl, a power sourcecircuit for supplying a necessary electric power for heating to theheater, a chaos signal generating circuit for generating a chaos signal,and an output control circuit for varying the output electric power ofthe power source circuit depending on the output of the chaos signalgenerating circuit to vary the heat output of the heater.
 36. A hotplate comprising: a metal plate for putting a material on, a heaterdisposed beneath the metal plate, a power source circuit for supplying anecessary electric power for heating to the heater, a chaos signalgenerating circuit for generating a chaos signal, and an output controlcircuit for varying the output electric power of the power sourcecircuit depending on the output of the chaos signal generating circuitto vary the heat output of the heater.
 37. An electromagnetic cookercomprising: a magnetic force generating coil for generating inductionheating in a cooking implement such as pot and frying pan, a highfrequency current generating circuit for generating high frequencycurrent to be supplied to the magnetic force generating coil, a chaossignal generating circuit for generating a chaos signal, and an outputcontrol circuit for varying the output current of the high frequencycurrent generating circuit depending on the output of the chaos signalgenerating circuit to vary the output of the magnetic force generatingcoil.